ArcOne I540-0400 Industrial Black Falcon® Welding Helmet Lightweight durable fiberglass design constructed with a special layer process for increased strength with lower weight Ideal for high heat passive welding applications and overhead welding Unique design channels keep fumes away from welder Back loaded filter can easily be replaced from the inside of the helmet Streamlined narrow face for working in tight locations Variable Shade from shade 7 to shade 14 Shade 3 in normal light state Shade selection may be made from outside of helmet while welding Two independent sensors and potentiometer Dark to light delay of 0.2 seconds Switching speed of 0.1 milliseconds 5-1/4" x 4-1/4" Fixed Front Lens